Can't add administrators

I can add people just fine to the security group, but when I try to add them as administrators or anything else I just get an error.
Wish I could be more specific about the error but it is just blank, and it happens in all browsers I have tried.

Everything else has worked just fine so it sucks to have an issue like this so close to finishing.

What is the sql command to add administrators? So I can add them in manually until the cms is fixed.

Ok hmm, got part of it to work. After just bashing the button to add someone to the "Content Authors" group, one slipped in and now it seems like that group works fine. But not the administrator group... And it still seems a bit sketchy.

Not an huge issue right now I guess since I can just edit the Group_Members sql table to move people to the administrator group. But this way is a bit annoying for many reasons.

I've never seen this myself, but some googling learned that this might have something to do with mod_security (an optional Apache firewall-ish module) being enabled on the webserver, finding something amiss with the page, possibly with the posted data. Other CMSses seem to run into this problem as well.

If that's the case, the general advice is to ask the host to do something about it (loosen the rules), or disable it. I found this bit of code, to put into your .htaccess:

Thank you so much for all the work finding what was wrong :). Will have to see if I can create an .htaccess or if I will have to ask them. Although I don't really want to lessen the security... oh well, will have to see what will be done.